JP5518294B2 - Orthopedic instruments with integrated load bearing members - Google Patents

Description

Disclosure details

(Field of the Invention)
The present invention relates to the field of orthopedics, and more particularly to methods and instruments used in orthopedic surgery.

〔background〕
Bone damage may occur as a result of an accident or illness. Such damage can occur, for example, in the articular cartilage that covers the epiphysis of the joint and the intraarticular cartilage between the ends of adjacent joint bones. If the damage that occurs in the joint is severe, implanting joint endoprosthesis can improve patient comfort and mobility.

  Joint endoprosthesis has been developed for alternative uses of the natural tissue of several human joints. There are a variety of knee prosthesis, hip prosthesis, shoulder prosthesis, ankle prosthesis and wrist prosthesis available to alleviate the patient's condition. Such devices are described, for example, in Warsaw, Ind. Of DePuy Products, Inc. And DePuy Orthopaedics, Inc. Manufactured and available.

  Standard joint endoprosthesis includes a metal component secured to the articulating end of the bone joint and generally includes a bearing component positioned between the metal components. A standard bearing component of a joint endoprosthesis has a surface that articulates with one of the metal components. For example, the hip endoprosthesis includes a metal femoral component that is secured to the proximal femur and a metal cup that is secured to the acetabulum. Many of these standard buttocks endoprosthesis include a liner in the acetabular cup articulating with the femoral component. Knee prosthesis generally includes a femoral component that is secured to the distal femur and a tibial component that is secured to the proximal end of the tibia. Typically, a bearing is provided between the femoral component and the tibial component. Similar systems using bearings are available as an alternative to other joints in the body. Such an endoprosthesis system is described in Warsaw, Ind. Of DePuy Orthopaedics, Inc. Commercially available.

  Orthopedic prostheses are also used as an alternative to lost bone in the treatment of various osteosarcomas. These orthopedic prostheses may include joint endoprosthesis elements and components used as an alternative to intermediate bone loss. Such prostheses are described in Warsaw, Ind. Of DePuy Products, Inc. And DePuy Orthopaedics, Inc. Manufactured and available.

  Trauma products are also available in the treatment of patients undergoing trauma (eg, fractures). Traumatic products often include orthopedic components such as bone screws, intramedullary nails, bone plates and fasteners. Such trauma products are available from Warsaw, Ind. Commercially available from DePuy Trauma and Extremes.

  Typically, each of the devices described above requires a set of specialized equipment to ensure that the device is properly implanted. Further, each of the different devices may require different sized equipment in order to properly place the device for different bone sizes. This necessitates inventory keeping of a large number of devices in a nursing facility or under the control of a device manufacturer's representative only for the purpose of assisting in the implantation of an orthopedic prosthesis.

  Moreover, in the case of single surgery, eg, hip, knee, shoulder, and other joint replacement surgery (partial or total surgery), 6 or more instrument trays and trial implants are potentially It may be required to be available for use. Even if a particular tray was not used during a previous operation, each tray must be sterilized again before use in a subsequent operation.

  For this reason, a large number of devices including devices that are not frequently used must be made available. While maintenance of large inventory is necessary, it is disadvantageous for a number of reasons. Instruments used in surgery are often made from metals such as stainless steel using, for example, conventional manufacturing processes such as machining, turning and drilling. Although efficient equipment can be manufactured through the use of the materials and processes, these equipment are extremely heavy and expensive. Therefore, the necessary equipment inventory becomes large and expensive. In addition, when these devices are used, the moving operation of the devices around the nursing facility becomes troublesome due to the weight.

  For illustrative purposes, a patella drill guide instrument is commonly used in orthopedic surgery. Typically, these devices are manufactured by machining stainless steel blocks. However, the area where maximum wear or load occurs is the actual guide hole. As such, the majority of stainless steel simply causes an increase in the weight and cost of the device. In addition, spike placement is often desirable to promote guide stability during use. Since the patella drill guide device is made of stainless steel, the addition of spikes necessitates polishing and finishing of the weld after the spikes have been welded onto the stainless steel block. This increases the manufacturing process and associated costs of the patella guide device.

  As a further example, the known distal femoral block cutting instrument requires a number of precision machining operations for the manufacture of the base block and pawl. Similarly, it is necessary to perform various machining operations using the finishing guide to form various plates, and to perform a turning operation to manufacture screws necessary for assembling the finishing guide.

  The problems associated with the need to maintain a large inventory of heavy equipment are further exacerbated by the fact that there are some equipment that is only needed to operate other equipment. One such device is the tibial tray trial. The tibial tray trial includes a tray device and a handle device that are machined in several steps. The handle device is designed to be removed after the tray device is in the desired position after being attached to the tray device. Therefore, additional equipment is required. Furthermore, the release mechanism used increases the complexity of the instrument because it includes a large number of additional components in addition to being heavy.

  In addition to the above-described restrictions, if a delay occurs due to the delivery and re-sterilization of the device, it causes an increase in the device provision cost. Also, when an implant system or implant device is modified or replaced, the inventory of such system or device will need to be replaced.

  Accordingly, there is a need for an orthopedic device that is lighter than all metal devices and has wear characteristics comparable to all metal devices. Furthermore, there is a need for equipment that is low in cost and easy to manufacture. Furthermore, there is a need for new and complex instruments to be manufactured quickly and at low cost.

[Summary]
An orthopedic instrument and a method of manufacturing the instrument are disclosed. In one embodiment, the orthopedic instrument includes a metal load bearing member and a non-metallic support structure integrally formed with the load bearing member, the load bearing member being sustainably attached to the non-metal support structure. It is done.

  In a further embodiment, the orthopedic instrument includes at least one metallic workpiece, the metallic workpiece being a work surface, a surface coupling feature, and a non-metallic support integrally formed with the surface coupling feature. And wherein the at least one metallic workpiece is sustainably embedded in the non-metallic support structure.

  In one method, the orthopedic device manufacturing process includes machining a metal load bearing member, generating a surface coupling feature on the metal load bearing member, and non-metal support member to the surface coupling. Forming in contact with the feature.

[Detailed explanation]
FIG. 1 shows an exploded view of a patella drill guide 100. The patella drill guide 100 includes two guide portions 102 and 104 joined by a shaft 106. Guide sites 102 and 104 include a number of spikes 108. Guide portion 102 further includes load bearing members 110, 112, and 114, and guide portion 104 includes load bearing members 116, 118, and 120. These load bearing members 110, 112, 114, 116, 118 and 120 are disposed in receptacles 122, 124, 126, 128, 130 and 132, respectively. These receptacles 122, 124, 126, 128, 130 and 132 are formed in either the guide site 102 or the guide site 104.

  These load bearing members 110, 112, 114, 116, 118 and 120 employ various connecting portions with the guide portions 102 and 104. As an example, the load bearing member 110 shown in FIG. 2 includes an outer peripheral portion 134. The outer periphery 134 includes a number of pyramidal protrusions 136. The pyramidal protrusion 136 provides a connection with the guide portion 102. In contrast, the inner hole 138 of the load bearing member 110 is smooth. This is because the inner hole 138 can be in contact with other equipment during normal use, so that the inner hole 138 becomes a processed surface.

  The load bearing member 112 shown in FIG. The outer peripheral part 140 includes a groove part 142 that circumscribes the load resistance t112. The groove 142 defines an upper flange 144 and a lower flange 146. Each of these surface features is part of a connection. Further, referring to FIG. 4, load bearing member 120 includes an outer peripheral portion 148. The outer peripheral portion 148 includes a number of protrusions 150. Each of these protrusions 150 is a part of the connecting portion.

  In addition to those described above, the load bearing member can be provided with a variety of surface features used in providing the connection. For example, the tooth portion 152 of the load bearing member 154 and the upper surface 156 and the lower surface 158 of the load bearing member 160 shown in FIG. 5 may form part of the coupling portion. The connecting portion is used to provide a surface (eg, a guide portion 102) that acts on a surrounding support structure, thereby limiting movement of the load bearing member relative to the support structure. Therefore, referring to FIG. 7, the axial impact on the load bearing member 110 in the direction illustrated by the arrow 162 or the arrow 164 is transmitted from the pyramidal protrusion 136 to the guide portion 102. Similarly, the rotational force acting on the load bearing member 110 as illustrated by arrows 166 or 168 is transmitted from the pyramidal protrusion 136 to the guide portion 102 as illustrated in FIG. In either case, the load bearing member does not move relative to the support member.

  The force acting on the load bearing member varies depending on the particular orthopedic instrument. Thus, when selecting a surface feature for a particular load bearing member, it may be selected based on the expected force. For example, the pyramidal protrusion 136 can be selected when both rotational and axial forces are generated.

  In applications where the axial force is the primary expected force, the groove 142 may be selected. Referring to FIGS. 9 and 10, the axial impact applied to load bearing member 112 in the direction illustrated by arrow 170 or arrow 172 is transmitted from upper flange 144 or lower flange 146 to guide portion 102, respectively. However, the rotational force acting on the load bearing member 112 as illustrated by arrows 174 or 176 is a mechanism (eg, friction, adhesion) at the point of connection between the outer periphery 140 of the load bearing member 112 and the guide portion 102. It is only transmitted to the guide part 102 through. Typically, the linkage provides greater resistance to movement than these mechanisms.

  Similarly, when the load bearing member 160 is embedded in the orthopedic instrument support site 180 as shown in FIG. 11, an axial impact on the load bearing member 160 in the direction illustrated by the arrow 182 or arrow 184 is present. , Transmitted from the upper surface 156 or the lower surface 158 to the support site 180, respectively. The rotational force acting on the load bearing member 160 is limited by the outer periphery of the load bearing member 160 and part of the upper surface 156 and the lower surface 158 through friction, adhesion, and the like.

  Another embodiment of the instrument is shown in FIG. FIG. 12 shows an exploded view of the femoral trial device 190. The femoral trial device 190 includes a support member in the form of a substrate 192 and a load bearing member 194. The load bearing member 194 includes a protrusion 196 and a recess 198. The substrate 192 is formed around the protrusion 196 and in the recess 198, thereby connecting the substrate and the load bearing member 194. The load bearing member 194 in this embodiment provides rigidity to the femoral trial 190 while the substrate 192 is formed into a more complex profile on the articulating surface.

  In the embodiment of FIG. 13, femoral trial device 200 includes a substrate 202 and load bearing members 204 and 206. The substrate 202 in the present embodiment is formed from a material having higher rigidity than the substrate 192. As a result, smaller load bearing members 204 and 206 can be used. In this embodiment, these load bearing members 204 and 206 are metal rods such as rod 208 of FIG. 14 that are curved into a desired shape.

  Similar to the substrate 192, the substrate 202 is formed in a more complex contour on the articulated surface. However, in this embodiment, the load bearing members 204 and 206 do not have recesses or protrusions that are used when connecting the load bearing members 204 and 206 to the substrate 202, but as shown in FIG. The substrate is formed such that the lips 210 and 212 of the lip 210 capture the load bearing members 204 and 206. In another embodiment, the load bearing member may be disposed entirely within the substrate.

  The partial capture of the load bearing member in the manner as shown in FIG. 15 can be further used to provide a work surface. The cutting guide block 210 shown in FIG. 16 includes a substrate 212 and two load bearing members 214 and 216. These load bearing members 214 and 216 extend above the surface of the substrate 212 to provide a working surface for contacting other equipment or devices.

  Referring to FIG. 17, a load bearing member 214 is shown with two ledges 218 and 220 on the surface 222 of the substrate 212. The processed portion 224 of the load bearing member 214 extends outward from the surface of the substrate 212. These ledges 218 and 220 define a chord 226 that traverses the load bearing member 214. The string 226 is shorter than at least one string extending across the load bearing member 214 and is more distant from the surface 222 of the substrate 212 than the string 226 (like the string 228). Thus, the ledges 218 and 220 couple the load bearing member 214 within the substrate 212 and the processing surface 224 avoids contact with the substrate 212 of other equipment or devices.

  An alternative processing surface is illustrated in FIG. Here, the finishing guide device 230 includes a substrate 232 and a load bearing member 234. As shown in FIG. 19, the load bearing member 234 is connected to the substrate 232 by a number of protrusions 236. The load bearing member 234 further includes a processed surface portion 238. The machining surface portion 238 extends from one arm 240 of the load bearing member 234 to another arm 242 along the entire length of the load bearing member 234.

  FIG. 20 includes a cutting block 240. The cutting block 240 includes a housing 242, a support substrate 244 and six load bearing members 246. These load bearing members 246 include a number of through holes 248. When assembled, these six load bearing members 246 are placed in the support substrate 244. The support substrate 244 is inserted into the cavity 250 in the housing 242.

  In the present embodiment, the use of protrusions on the load bearing member 246 is not desirable because there are restrictions on the spacing within the cutting block 240. Furthermore, the size of the support substrate 244 is limited by the size of the cavity 250. Therefore, the hole 248 is used as a surface feature that forms a connection with the support substrate 244. Referring to FIG. 21, these holes 248 are disposed in the two end portions 252 and 254. These end portions 252 and 254 are separated by the processing portion 256. The substrate 244 is formed around the two end portions 252 and 254. Therefore, the substrate 244 extends to the dotted lines 258 and 260 inward from the end portions 252 and 254, respectively. The substrate 224 extends through each through hole 248. Therefore, the load bearing member 246 is supported between the two portions of the substrate 244 on either side of the end portions 252 and 254, and the two portions of the substrate are connected through the through hole 248.

  As a design option, the load bearing member may include a more substantial portion of the device. As an example, FIG. 22 shows a tibial block cut 262 that includes a body 264 and a cutting guide 266. The cutting guide 266 is made of a non-plastic material such as stainless steel, and the body 264 is made of a plastic material.

  In the present embodiment, the cutting guide 266 that is a load bearing member occupies about one-half of the volume of the tibial block cutting 262. However, of these two main components, the support structure body 264 has a more complex design. As a result, more complex parts of the tibial block cutting 262 are molded rather than machined, and therefore, a lower cost manufacturing process is required in manufacturing the tibial block cutting 262.

  In a further embodiment of the device, part of the support structure is removable. FIG. 23 shows a tibial tray trial 270 that includes an operating handle 272 and a tray 274. The operation handle 272 is connected to the tray 274 through the notch 276. Load bearing members 278 and 280 are disposed in tray 274 for use as a drill guide. In the present embodiment, the tray 274 and the operation handle 272 are made of the same non-metallic material.

  The non-metallic material is selected such that the tray 274 supports the load bearing members 278 and 280 and has sufficient strength and rigidity to operate the tray 274 in place by the notch region. The material is further selected such that the connection between the operating handle 272 and the tray 274 can be broken at the notch 276 when sufficient force is concentrated at the notch 276. Therefore, once the tray 274 is placed and fixed at a desired position, a force is applied to the operation handle 272, and as a result, the operation handle 272 is broken at the notch 276. Therefore, the tibial tray 270 is a single use device.

  FIG. 24 illustrates one embodiment of the device. In FIG. 24, the load bearing member is operated using the support member. The keel punch guide 282 includes a guide 284 and a handle 286. As shown in FIG. 25, the pin 288 extends from the inner hole 290 of the handle 286 into the guide 284. The thumb piece 292 is connected to the pin 288 and extends through an opening 294 in the handle 286. A spring 296 is disposed in the inner hole 290. The spring 296 is disposed around the centering pin 298. Centering pin 298 extends into inner hole 300 in pin 288.

  In operation, a force is applied to the pin 288 against the spring 296 using the thumb piece 292. As the spring 296 is compressed, the pin 288 moves further into the inner hole 290 of the handle 286 and the centering pin 298 is inserted into the inner hole 300. When the keel punch guide 282 is in the desired position, the thumb piece 292 is released and the spring 296 moves the pin 288 toward the guide 284 and partially into the guide 284. Therefore, the connection between the pin 288 and the thumbpiece 292 must have sufficient strength that the spring 296 can be compressed without failure.

  FIG. 26 shows the universal handle 302. The universal handle 302 includes a load bearing member 304, a support member 306, and an engagement mechanism 308. The load bearing member 304 includes a metal seat 310. The metal seat 310 is disposed outside the support member 306 and the three flanges 312, 314 and 316. These flanges 312, 314, and 316 form a connecting portion with the support member 306 as shown in FIG. The load bearing member 304 further includes a coupling site 318 and a flange 320. The flange 320 is positioned in the inner hole 322 with the spring 324. The flange 320, the spring 324, and the engagement mechanism 308 are used to couple the universal handle 302 to other equipment.

  The universal handle 302 is used to transmit an impact to the instrument or device to which the universal handle 302 is coupled. Therefore, the operator can apply an impact to the metal receiving base 310 using the mallet while holding the universal handle 302 around the support member 306. The load bearing member 304 transmits the force from the impact to the coupling site 318, which in turn transmits the impact to the coupled device or implant. The flanges 312, 314 and 316 are configured to ensure that the load bearing member 304 is firmly fixed 306 in the support member during such an impact.

  In one method, the device is constructed in a similar manner. Referring to FIG. 28, method 330 begins at step 332 for manufacturing a load bearing member. The load bearing member may be manufactured from a metal material such as stainless steel, cobalt, chromium, or nickel. The process used in load bearing member manufacture depends on the specific equipment and metal type. Some examples of processes that can be used include machining, drilling, electrical discharge machining, polishing and stamping.

  As an example, the load bearing members 110, 112, 114, 116, 118, and 120 are lathed, and the desired surface features are formed in these load bearing members. The load bearing member 194 may be machined by laser, water jet cutting, stamping, or by forming a blank into the desired shape and texturing the protrusions 196 and recesses 198. The load bearing member 204 can be cut and stamped. These load bearing members 246 can be manufactured by cutting a metal plate into the desired shape and drilling through holes 248.

  After machining the load bearing member, the load bearing member is positioned in an injection mold in step 334. Positioning of the load bearing member within the injection mold can be accomplished in any acceptable manner. For example, in different technical fields, US Pat. No. 6,126,882 to Iwinski et al. Discloses a method of forming a socket tool with a metal insert by placing the metal insert in a mold. After positioning the load bearing member, in step 336, resin is injected into the mold. The type of the resin is selected so that desired characteristics (for example, rigidity and strength) can be obtained while weight reduction or manufacturability can be obtained as compared with the metal used for the load bearing member. Therefore, different devices can be manufactured using different resins. Acceptable resins include medical grade plastic and glass filled substrates (eg, polyamide polyphenylsulfone, polyethersulfone, polysulfone, polyketone, and polyallylamide).

  When designing the injection mold, ensure proper redundancy of the connection and penetration of the injection resin into the surface feature, thereby ensuring the desired connection for the expected force. Care must be taken to ensure that is formed. Larger surface features, such as flanges 312, 314, and 316 in FIG. 27, may function properly as part of the connection even when the cavity in the molded support member is small. Thus, an extra flange may not be necessary. However, due to the presence of voids in the molded support member, the ability to function as part of a smaller surface feature, for example, a connection such as through-hole 248, can be significantly reduced. Therefore, extra through holes and more stringent treatment of the injection mold may be required.

  After proper curing, the integral load bearing member and support member are removed from the injection mold in step 338. If in step 340 the device is substantially complete, then the process proceeds to step 342 and ends. As an example, the step of integrally molding the support material with the load-bearing material may include devices such as patella drill guide 100, femoral trials 190 and 200, finishing guide device 230, tibial block cutting 262 and tibial trial tray. It may be the final manufacturing process for embodiments such as 270.

  If subsequent assembly is required at step 330, the device is assembled at step 344 and the process ends at step 342. Equipment embodiments that may require assembly after the molding process include cutting block 240, keel punch guide 282, and universal handle 302.

  Although the invention has been illustrated by way of example process and system component descriptions and has been described in great detail with respect to various processes and components, applicants may not limit the scope of the appended claims to such details. Not even intended. Those skilled in the art will readily conceive further advantages and modifications. Accordingly, the present invention is not limited in its largest aspects to the specific details, implementations or illustrative examples shown and described. Accordingly, departures from such details may be made without departing from the spirit or scope of applicants' general inventive concept.

Embodiment
(1) In orthopedic instruments,
Metal load-bearing members,
A non-metallic support structure, wherein the load-bearing member is integrally formed with the load-bearing member such that the load-bearing member is sustainably attached to the non-metallic support structure;
Including orthopedic equipment.
(2) In the orthopedic instrument according to embodiment 1,
The metal load bearing member includes a surface feature,
The orthopedic instrument, wherein the non-metallic support structure is configured to contact the surface feature to form a connection.
(3) In the orthopedic instrument according to embodiment 2,
The surface feature includes an orthopedic instrument that includes a plurality of pyramidal protrusions.
(4) In the orthopedic instrument according to embodiment 2,
The orthopedic instrument, wherein the surface feature includes a plurality of protrusions.
(5) In the orthopedic instrument according to embodiment 2,
The orthopedic instrument, wherein the surface feature includes a flange.
(6) In the orthopedic instrument according to embodiment 2,
The surface feature includes a hole extending from one side of the load bearing member to another side of the load bearing member;
The orthopedic instrument, wherein the non-metallic support structure is formed to extend through the hole.
(7) In the orthopedic instrument according to embodiment 1,
The load bearing member includes an inner working surface and an outer surface;
The orthopedic instrument, wherein the non-metallic support structure is formed to contact the outer surface of the load bearing member.
(8) In the orthopedic instrument according to embodiment 1,
The load bearing member is
Processing part,
A cross-section comprising a first string and a second string, wherein the first string is parallel to the second string, shorter than the second string, A cross section disposed between the two strings;
Including
The non-metallic support structure is formed adjacent to the second string, but not adjacent to the first string, thereby capturing the load bearing member with the processed portion exposed ( An orthopedic device that is supposed to entrap).
(9) In the orthopedic instrument according to embodiment 1,
The load bearing member is
Processing part,
A first cross section having a first width and a first circumference;
A second cross section having a second width and a second perimeter;
A third cross section with a third width and a third circumference;
Including
The first cross section, the second cross section, and the third cross section are each substantially orthogonal to the processed portion,
The second cross section is disposed between the first cross section and the third cross section and has a width shorter than the width of the first cross section and the third cross section;
The orthopedic instrument, wherein the non-metallic support structure is formed around the first circumference, the second circumference, and the third circumference.
(10) an orthopedic instrument,
At least one metal workpiece including a working surface and a surface connection feature;
A non-metallic support structure integrally formed with the surface connection feature, wherein the at least one metal workpiece is sustainably embedded in the non-metallic support structure;
Including orthopedic equipment.

(11) In the orthopedic instrument according to embodiment 10,
The orthopedic instrument, wherein the non-metallic support structure is formed from a plastic material molded to the surface connection feature.
(12) In the orthopedic instrument according to embodiment 11,
The orthopedic instrument, wherein the surface coupling feature is one of a score, a flange, a groove, a hub or a cavity.
(13) A method of manufacturing an orthopedic instrument,
Machining a metal load bearing member;
Generating a surface connection feature on the metal load bearing member;
Forming a non-metallic support member in contact with the surface coupling feature;
Including a method.
(14) In the method according to embodiment 13,
Placing the metal workpiece in a mold, wherein forming the non-metallic support member includes injection molding a plastic material into the mold;
Further comprising a method.
(15) In the method of embodiment 14,
Overmolding a soft touch polymer onto at least a portion of the injection molded plastic material;
Further comprising a method.
(16) In the method of embodiment 13,
Generating the surface connection feature includes drilling a hole through the load bearing member of the metal;
Forming the non-metallic support member includes flowing a plastic material through the hole;
The method further includes the step of curing the plastic material in the hole to form a connection.
(17) In the method of embodiment 16,
Removing the formed non-metallic support member and the connected metal workpiece from the mold;
Assembling the formed non-metallic support member and the joined metal workpiece into an orthopedic cutting block;
Further comprising a method.
(18) In the method according to embodiment 13,
Machining the metal load bearing member includes stamping a sheet metal piece;
The method of generating the surface connection feature includes forming a recess in the stamped sheet metal piece.
(19) In the method according to embodiment 13,
Generating the surface connection feature on the metal load bearing member includes forming an elongated rod;
Machining the metal load bearing member includes bending the rod;
Forming the non-metallic support member in contact with the surface connection feature includes at least partially embedding the rod in the non-metallic support member.
(20) In the method of embodiment 19,
The step of at least partially embedding the rod comprises:
Embedding the rod in the non-metallic support member such that a processed portion of the rod extends outwardly from two opposing lips of the non-metallic support member;
Including a method.

FIG. 1 shows an exploded perspective view of a patella drill guide device comprising a load bearing member. These load bearing members are coupled to the support member using a variety of different surface features in accordance with the principles of the present invention. FIG. 2 shows a perspective view of one of the load bearing members of FIG. The load bearing member employs a pyramidal protrusion to form a connecting portion with the support member of FIG. 1, thereby suppressing the axial direction and rotational movement of the load bearing member with respect to the support member. FIG. 3 shows a perspective view of one of the load bearing members of FIG. 1, wherein the load bearing member employs a groove to form a connecting portion with the support member of FIG. Is prevented from moving in the axial direction relative to the support member. 4 is a perspective view of one of the load bearing members of FIG. 1. The load bearing member employs a number of protrusions to form a connecting portion with the support member of FIG. The axial movement of the load member relative to the support member is suppressed. FIG. 5 is a perspective view of one of the load bearing members of FIG. 1, wherein the load bearing member employs a tooth portion extending in the axial direction to form a connecting portion with the support member of FIG. The rotational movement of the load bearing member relative to the support member is suppressed. FIG. 6 is a perspective view of an alternative load bearing member. The size of the alternative load bearing member is such that the upper surface and the lower surface of the load bearing member form a connecting portion with a support member, and The load member is sized such that axial movement of the load member relative to the support member is suppressed. FIG. 7 is a partial vertical sectional view of the load bearing member of FIG. 2, and the load bearing member is integrally formed with the support member of FIG. 1, so that the pyramidal protrusions of the load bearing member and the support member A connecting portion is shown in between, which suppresses axial movement of the load bearing member relative to the support member in accordance with the principles of the present invention. FIG. 8 is a partial horizontal sectional view of the load bearing member of FIG. 2, and the load bearing member is integrally formed with the support member of FIG. 1, so that the pyramidal protrusion of the load bearing member and the support member In this way, the axial movement of the load bearing member relative to the support member according to the principles of the present invention is suppressed. 9 shows a partial vertical cross-sectional view of the load bearing member of FIG. 3, wherein the previous load bearing member is integrally formed with the support member of FIG. 1, thereby providing a gap between the groove of the load bearing member and the support member. A connecting portion is shown, thereby suppressing axial movement of the load bearing member relative to the support member according to the principles of the present invention. FIG. 10 is a partial horizontal cross-sectional view of the load bearing member of FIG. 3, and the load bearing member is integrally formed with the support member of FIG. 1, whereby the outer periphery of the load bearing member and the support member The absence of a connection between them is indicated. FIG. 11 is a partial vertical sectional view of the load bearing member of FIG. 6, wherein the load bearing member is integrally formed with the support member, whereby the upper and lower surfaces of the load bearing member and the support member are A connecting portion is shown in between, which suppresses axial movement of the load bearing member relative to the support member in accordance with the principles of the present invention. FIG. 12 is an exploded perspective view of a femoral trial device having a load bearing member, which is coupled to a support member using protrusions and recesses according to the principles of the present invention. FIG. 13 shows a perspective view of another embodiment of a femoral trial device employing a rod as a load bearing member according to the principles of the present invention. FIG. 14 shows a perspective view of a rod that can be used as a load bearing component in a device according to the principles of the present invention. 15 is a partial vertical cross-sectional view of the load bearing member of FIG. 14, wherein the load bearing member is integrally formed with the support member, thereby processing the load bearing member extending above the support member according to the principles of the present invention. The surface is shown. FIG. 16 is a perspective view of a cutting guide block device including a load bearing member, and the load bearing member is connected to a support member. FIG. 16 also shows the working surface of the load bearing member extending over the support member in accordance with the principles of the present invention. FIG. 17 is a partial vertical cross-sectional view of one of the load bearing members of FIG. 16, wherein the previous load bearing member is integrally formed with the support member, and the connection with the support member is formed by a ledge of the support member; The ledge overhangs a portion of the load bearing member according to the principles of the present invention. FIG. 18 is a perspective view of a finishing guide device including a load bearing member, and the load bearing member is connected to a support member. FIG. 18 also shows the working surface of a load bearing member that extends along various surfaces of the support member according to the principles of the present invention. FIG. 19 shows a perspective view of the load bearing member of FIG. FIG. 20 shows an exploded perspective view of a block cutting device with multiple load bearing members according to the principles of the present invention. FIG. 21 shows a perspective view of one of the load bearing members of FIG. 20 and shows a number of holes. These holes can be overmolded with the support member, thereby providing a connection between the load bearing member and the support member according to the principles of the present invention. FIG. 22 shows a perspective view of a tibial block cutting device with a load bearing member according to the principles of the present invention. FIG. 23 shows a perspective view of a tibial trial tray device with a support member. The support member can be partially removed, resulting in a single use device according to the principles of the present invention. FIG. 24 is a perspective view of a keel punch guide device including a support member. The support member is used to operate the load bearing member coupled to the support member in accordance with the principles of the present invention. 25 shows a vertical cross-sectional view of the keel punch guide device of FIG. FIG. 26 shows a perspective view of a universal handle device comprising a support member. The support member is used to hold the load bearing member coupled to the support member in accordance with the principles of the present invention. FIG. 27 shows a vertical cross-sectional view of the universal handle device of FIG. FIG. 28 illustrates a process that can be used in manufacturing equipment comprising a load bearing member coupled to a support member in accordance with the principles of the present invention.

Claims (4)

In orthopedic equipment,
A plurality of metal load bearing members, each having an inner hole;
A non-metallic support structure, wherein the load-bearing member is integrally formed with the load-bearing member such that the load-bearing member is permanently attached to the non-metal support structure;
Including
Each of the plurality of metal load bearing members includes a surface feature, and the non-metallic support structure is formed to contact the surface feature to form a coupling portion;
The surface feature has a different shape depending on the instrument applied to the inner hole ,
The non-metallic support structure includes first and second planes, two guide portions, and a shaft, the two guide portions are coupled by the shaft, and the load bearing member is the 2 Is located in one guide area,
The non-metallic support structure includes spikes projecting from the first plane of the two guide sites;
Orthopedic equipment. The orthopedic instrument of claim 1,
The surface feature includes an orthopedic instrument that includes a plurality of pyramidal protrusions. The orthopedic instrument of claim 1,
The orthopedic instrument, wherein the surface feature includes a plurality of protrusions. The orthopedic instrument of claim 1,
The orthopedic instrument, wherein the surface feature includes a flange.

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